Having done some mold removal and environomental work on homes, how you clean it goes this way. -quarantine the area and have all the air filtered out of the house. -remove anything that has mold on it by placing into sealed plastic bags for disposal. -For the mold on wood you spray it with a bleach solution and scrub off the mold or just remove the wood and replace it if possible -if you just cleaned the wood then you sand down the cleaned area to get rid of any left over mold -use an anti mold solution on the cleaned area and you are done Tips to help prevent mold into your home - Limit the amount of plants, fish tanks or items with water in them in an area - when cooking, always run the vent over your stove - This one is a big one, after showering, close the door and leave the fan running for about 30 minutes to get the heat and moisture out of the house. If you are worried about using energy for the fan, dont worry. If you ran any fan from the last 15 years or so all the time for a year straight, it would probably cost you $1, so dont worry about it. - Make sure you have a good seal around the base of your tube and toilet, alot of water seaps under the tube and toliet. More then likely everyone on here with a house, the flooring under your tube and toilet is in rough shape.